Influence of sintering process of tungsten alloy products
The main production process of tungsten alloy products is the sintering process, and sintering has a decisive influence on the properties of tungsten alloy products. Even if the press billets are the same, using different sintering processes has different effects on the properties of the sintered products.
Sintering of tungsten alloy products results in bonding between powder particles, and the content of the bonded phase is a factor that determines the properties of tungsten alloys. Also increasing the cobalt content and increasing the WC grain size helps to improve the toughness, but also reduces the hardness and thus the wear resistance of the substrate.
During the sintering process, the billet undergoes a series of physical and chemical changes, beginning with the evaporation or volatilization of water or organic matter, the elimination of adsorbed gas, the elimination of stress, the reduction of oxide on the surface of the powder particles; followed by diffusion between atoms, sticky flow and plastic flow, the increase of contact surface between particles, recrystallization, grain growth, etc. Zhuzhou pintejin produces tungsten alloy products with advanced technology, after deep cooling treatment, overpressure sintering, isostatic pressing, special ingredients, spray granulation and other processes, the whole process according to the national standard specification of cemented carbide, so its product quality is guaranteed.
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